Steam-boiler



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STEAM 3011.311.

No.- 476,053. lPatented May 3l, 1892.

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J. MAGGORMACK. STEAM BOILBR.

No. 476,053. Patented May 31, 1892.

rricn arrgnr JOHN MACOORMACK, OF4 ALBANY, NEW YORK.

STEAM-BOILER.,

SPECIFICATION forming part of Letters Patent No. 476,053, dated May 31, 1892.

Application tiled October 8, 1891.

To all whom, it may concern:

Be it known that I, JOHN MACCORMAOK, a citizen of the United States, residing at Albany, in the county of Albany, and in the State of New York, have invented certain new and usee ful Improvements in Steam-Boilers; and I do i hereby declare that the following is a full,

clear, and exact descriptionthereof, reference being had to the accompanying drawings, in which- Figure l is a View, partly in section and partly in elevation, of awater-tube boiler and brick-work therefor constructed in accordance with my invention; Fig. 2, a transverse section on the line :c fr, Fig. l Fig. 3, a detail view in perspective of the plate forming one of the walls of the Water-heads and constituting the means of attachment to said heads of the boiler-shell and water-tubes; Fig. 4, a section through the same; Fig. 5, a detail view, in elevation, of a portion of one of the plates which form a part of the wall or partition upon the tubes for deiiecting the course of the heated gases from the furnace; and Fig. 6, a detail View, in horizontal section, of a portion of said wall.

Letters of like name and kind indicate like parts throughout the several figures.

The object of my invention is to improve the construction of steam-boilers, whereby the same may be rendered more economical and efficient in use and more cheaply put upon Idie market; and to these ends it consists in the parts thereof constructed and combined substantially as and for the purposes herein after specified.

The description or type of steam-boiler which I have sought to improve is the watcrtubeboiler; and as constructed by me the same consists of a cylindrical boiler-shell A and a series of parallel tubes B, attached to and supported both at opposite ends by two waterheads C and O. Each water-head is made of an inner plate c, to which the boiler-shell and tubes are fastened, `and an outer convex or dished plate, c', which are both riveted to the opposite edges of an annulus or ring c2. The plate cis circular in shape and has an annular flange c3 extending around its edge, by which it is riveted to the ring c2, and in its upper portion said plate has an eccentrically-located openingct, which is surrounded by an annu- Serial No. l$8,019. (No model.)

lar fiaugec, that extends in a direction re- `verse to that of flange c3, into which projects the end of the boiler-shell and to which the same is riveted. The position of the hanged opening c.4 is such that. its flange c5 is in the same plane at the top as the flange c3011 the plate. The tubes may be attached to the plate c in any suitable way, and they are disposed beneath the shell and about half-way up around the sides thereof. Suitable brick-work D is built around the boiler as thus coustructed, and the latter is supported on the end walls thereof by means of angle-plates E and E, secured to the sides of the water-heads, whicheugage said walls. The front waterhead is rigidly or lixedly supported; but the rear oneis supported so as to allow such movemeut as is incidental to .the expansion and contraction of the parts-as, for instance, by having rollers placed between the angle-plates and the supporting part'of the wall.

At the front water-head provision is made for the egress of steam for use and the attachment of the safety-valve, dac., and in the two heads manholes are provided in the (lished plates thereof near their bottoms to enable access to their interiors when necessary.

The furnace, as usual, is located under the forward part of the boiler, being provided with any desired form of grate and having a iire or bridge wall F situated substantially midway between the end walls of the brick-Work.

To utilize the products of combustion to the best possible advantage by subjecting the whole length of tubes as nearly as possible to them, l provide on each side of the shell A, j ust above the top row of the tubes, partitions G and G, composed of lire-tiles, which extend from the shell to the adjacent part of the brick-work and from the front water-head to a wall d, arched over the upper half of said shell near the rear head and forming part of the uptake H, and a substantially vertical partition I, that closes up the spaces between the tubes, extends from and immediately below the arched wall d. The products of combustion from the furnace will pass therefrom and by reason of the horizontal partitions G and G and the vertical one I be compelled to take acircuitous course-,such as indicated by the arrows-before eventually making their exit through the uptake, being thus placed into contact with the tubes throughout their length. To aid the draft, the bridge or fire Wall F is provided with a number of vertical air lines or ductsf, having at their upper ends l horizontal extensions f', directed rearwardly toward the uptake H.

The wall or partition I, in order that it may readily be built after the water-tubes have been secured to the water-heads and be enabled to endure the heat to which :it will be subjected, is constructed of two separated series of non-conducting plates superimposed on each other to form a continuous piece from the top row of tubes to the bottom row, between which series is placed a fire-resisting compound. Each'of said plates of a series has a width equal to the distance from the center of one row of tubes to the center ot an adjacent row, a length to extend across the entire line of tubes in a row, and a thickness a trifle less than the space between two adjacent rows of tubes, being at its opposite edges provided with seniicircular openings t, whose diameter is the same as that of the tubes. Thus constructed said plate is inserted edge- Wise in the space between two adjacent rows of tubes, and when properly positioned with relation to them is turned through a quartercircle, so as to place its semicircular notches into engagement with appropriate tubes. This is repeated with other similar plates until the two separated series before mentioned are complete. Then with a board or other object placed across the bottom plates of the two series to temporarily close the space between a compound of asbestus and kaolin, made by thoroughly mixing the former with the latter in a liquid condition, is poured between the two series of plates to fill the space between them and then hardened.

In order to key or lock the composition and plates together, each plate has a number of inwardly-projecting headed studs i', around which the compound collects. Between the top of the bridge-Wall and several rows of the tubes adjacent thereto I also place a similarly-constructed partition.

Although I have shown and described a horizontally-arranged boiler, it is to be understood that there are features of myinvention applicable to vertical boilers as well and that- I contemplate the latter arrangement should it be found necessary or desirable-as, for instance, in buildings where economy of floorspaee must be considered. When the boiler is to be placed vertically, one of the water-heads should be increased in length and placed uppel-most in setting to provide necessary steamspace.

` Having thus described my invention, what I claim isl. In a steam-boiler, in combination, the boiler-shell, the water-tubes disposed beneath the same, the lire or bridge wall, the horizontal partition arranged above said tubes and ex tending from each side of the boiler-shell, the means for ultimately discharging the products of combustion, and the partition -intermediate said bridge-wall and the latter, substantially as and for the purpose specified.

2. In combination with the tubes of a boiler, thetwo series of separate superimposed plates, said series being separated by a space, and the lire-resisting compound in such space, substantially as and for the purpose described.

S. In combination with the tubes of a boiler, the partition or wall composed of a series of superimposed plates consisting each ofapiece notched in its opposite edges to partially einbrace the tubes of adjacent rows and a tireresisting body secured to said plates, substantially as and for Ithe purpose specified.

1i. In combination with the tubes of a boiler, the partition or wall thereon consisting of a series of superimposed plates, each of which has notches in its opposite edges to partially embrace the tubes of adjacent rows, a fireresisting body, and the studs or keys on said plates to engage said body, substantially as and for the purpose shown.

5. In combination with the tubes of a boiler, the partition or Wall thereon consisting ot' two series of superimposed plates, each of the latter having notches in opposite edges to partially embrace the tubes of adjoining rows, and the fire-resisting substance placed between the two series of plates while in a plastic condition, substantially as and for the purpose described.

6. In combination with the tubes of aboiler, the wall or partition thereon consisting of a fire-resisting body placed between two plates,-

each of which has inwardly-proj ecting headed studs or keys engaging such body, substantially as and for the purpose set forth.

7. In combination with the tubes of a boiler, arranged in parallel rows, the partition or Wall formed in part by a series of plates, each of which has such thickness as to enable it to be passed between the tubes of adjacent rows and in its opposite edges is notched to partially embrace said tubes, substantially as and for the purpose specified.

8. In combination,the boiler-shell,theseries of water-tubes disposed beneath the lower half thereof,a tire or bridge wall,the horizontal partitions on each side of the boiler-shell, the uptake, the wall arched over the upper half of the boiler-shell just in advance of the latter, and the partition or wallon the tubes eX- tending downward from said arched wall, substantially as and for the purpose set forth.

In testimony that I claimthe foregoing I have hereunto set my hand this Gth day of July, 1891.

JOHN MACCORMACK.

Witnesses:

CHAs. S. BYrNeToN, THoMAs A. BECKET, Jr.

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